Jack eye for harness levers



Dec. 39, 1924-. 1,521,183

E. R. HOLMES ET AL v JACK EYE FOR HARNESS LEVERS Filed Nov. 9, 1923 mam 071111111 ATTOITIVE Yd Patented Dec. 30, 192%..

tllttl'fhlifi tlTATES 1,521,183 PATENT @FWQEE.

ELBRIDGE It. HOLMES AND WALTER H. WAKEFIELD, 0F WORCESTER, MASSACHU- SETTS, ASSIGNORS T0 CROIVIPTON & KNGYVLT-S LOOIVL OR-KS, 0F WORCESTER,

MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

JACK EYE FOB HARNESS LEVERS.

Application filed November 9, 1923. Serial No. 673,759.

To all whom it may concern:

Be it known that we, ELBRIDGE R. Homrns and lVAL'rnn H. WAKEFIELD, citi- Zens of the United'States, both residing at lVorcester, in the county of lVorcester and State of Massachusetts, have invented new and useful Jack Eyes for Harness Levers, of which the following is a specification.

.his invention relates to improvements in jack eyes for harness levers such as are found in fancy looms, and an object of the invention is to provide a jack eye which will resist wear but at the same time he possessed of the requisite resilience.

rinother object of the invention is to provide a jack eye formed of different grades of steel assembled while annealed or untempered and then subjected to a tempering process which hardens theybearing portions of the eye while imparting toughness but not brittleness to the side portions of the eye.

A further object of the invention is to provide a steel jack eye, one of the members of which shall have integrally formed therewith a bearing suitable for a lock to cooperate with the associated harness lever or jack.

With these and other objects in view, which will appear as the description proceeds, our invention resides in the combination and arrangement of parts hereinafter described and set forth in the claim.

In the accompanying drawings wherein two forms of our invention are shown,

Fig. 1 is a front elevation of sufficient portions of a loom to show our invention,

2 is an enlarged front elevation of one form of jack eye,

Fig. 3 is an end elevation of the jack eye shown in Fig. 2,

Fig. 4 is a horizontal longitudinal section on line 4-4 of Fig. 3.

Referring to the drawings, it will be seen that the loom side 10 has connected thereto an arch 11 to which the harness levers or jacks 12 are pivoted as at 13. Both arms of the levers 12 are provided with notches 14 by means of which adjustments can be given to the throw of the harnesses. A sheave 16 is provided for each of the levers 12 and guides harness connector 17, the upper end of which is connected to a wire link 18. A. second wire link 19 is associated with the other end of the harness frame in a well known manner. The matter thus far de scribed is in common use and forms no part of our present invention.

In order that the motions of the levers 12 may be imparted to the harness frames and to the wires 18 and 19, there are usually provided so-called jack eyes having a hearing portion to fit in one of the notches 1-l and also having provision for pivotal connection with said links 18 and 19. As shown herein, our preferred form of eye comprises side members 20 and 21 which are spaced and held together by rivets 22, 23 and 2%, respectively. Reference to Fig. at will show that member 20 has struck therefrom a tongue 25 which preferably extends to the member 21 through an opening 26 formed in loclr27 by means of which relative inotion of the j ack eye transversely of the lever is prevented. hen it is desired to change the setting of the jack eye, the lock is swung to the right of the position shown in F 2, thus permitting the stud 22 to be lifted out of the associated notch 14.

It is one important feature of our invention to have the studs 22, 23, 24 formed of relatively high carbon steel such as 0.60 or 0.70 per cent, while the side members 20, 21 are of relatively low carbon content, as 0.10 to 0.20 per cent. The lock 27 is preferably formed of low carbon steel.

While all the parts of the jack eye are untempered or in an annealed condition they are assembled as shown in the drawing and the studs riveted in place after which the entire jack eye is subjected to heattreatment, the result of which is to harden the studs so that they will resist wear and leave the sides and lock tough so as to resist fatigue. The tongue 25 is subjected to considerable jarring because of the motion of the lock 27 and the tongue should therefore possess the toughness it acquires in the heat treatment because of the fact that it is integral with one of the side members of the jack.

The jack levers are usually formed of cast iron of such a thin section that the notches 14 are chilled and cannot ordinarily be made perfectly smooth, with the result that the jack eyes heretofore used in connection with harness levers have shown rapid wear.

Having thus described our invention, it Will be evident that changes and modlfieations may be made by those skilled in the art Without departing from the spirit and scope of the invention as set forth inthe appended claim, and We do not wish to be otherwise limited to the details herein disclosed. I

What We claim is 5 y In a, jack eye for harness levers, a pair ofspaced substantially parallel sidej menibers riveted together, a tongue struck from one of said members and extendingtoward the othei and a lock pivoted on the tongue and between the side members for engagement With the harness lever.

In testimony whereof We have hereunto allixed oursignatures. I

' ELBRIDGER. HOLMES.

- WALTER H. WAKEFIELD. 

